Doefee



(Nq ModeL) FFMAN.

l Lead and Crayon Holder- No. 237,384. i Patenjted Pep. 8,1881.

N.PEYER$. PHOTO-LITHOGNAFHER. WASNINGTGNv Dr C.

UNITED STATES PATENT OFFICE.

JOSEPH HOFFMAN, OF NEW YORK, N. Y., ASSIGNOR TO OSEPH REGKEN- DORFER, OF SAME PLACE.

LEAD AND CRAYON HOLDER.

SPECIFICATION formingpart of Letters Patent No. 237,384, dated February 8, 1881. Application filed December 17, 1880. (No model.)

To all whom it may concern:

Be it known that I, JosEPH HOFFMAN, of the city, county, and State of New York, have invented certain new and useful Improvements in Lead and Crayon Holders, of which the following is a specification.

My invention relates to that kind of lead and crayon holders in which there are combined within the sheath or handle a slotted and toothed tubular receiver, and a longitudinallysliding toothed follower contained in the receiver, these two parts being caused to engage or disengage one another by a partial rotation of one with respect to the other.

My improvement consists in combining with the sheath or handle and the tubular toothed and slotted receiver and the toothed follower a longitudinally-slotted guide-tube which contains the follower and is itself contained in the receiver, said guide-tube and receiver bein g capable of a movement of partial rotation relatively to one another for the purpose of throwing the toothed detent of the follower, which projects out through the slotin the guidetnbe, into and out of engagement with the toothed receiver. 7

The nature of my invention, and the manner in which the same is or may be carried into effect, will be understood by reference to the accompanying drawings, in which- Figure 1 is a longitudinal central section, partly in elevation, of a holder with the follower locked in place, embodying my invention. Fig. 2 is a like view of the same with the follower unlocked. Fig. 3 is a side elevation of the receiver and guide-tube, detached. Fig. 4 is a side elevation, partly in section, of the guide-tube and the follower which it contains. Fig. 5 is a cross-section of the holder on an enlarged scale.

A is the sheath or handle, of any approved construction, provided with a tip or contracted front end, a, preferably detachable. Centered within the sheath, and united firmly therewith, is the longitudinally-slotted tubular receiver, B, one edge of the slot b being toothed, as indicated at 0.

Within the receiver is the longitudinallyslotted guide-tube O. This tube passes back through the open rear end of the receiver, and is attached to the pressure-cap D, which is swiveled to it substantially in the manner and for the purposes described in my Letters Patent No. 235,150 of December 7, .1880. A

reacting-spring, d, is interposed between the cap and a shoulder on the sheath or handle, as in the ordinary automatic holder.

Within the guide -tube is the freely-slidin g follower E, which carries the lead 0, and is provided with a tooth or detent, i, of approximately the shape of a right-angle triangle in plan. This tooth projects out through the slot f in the guide-tube far enough to come opposite the toothed edge 0 of the slotted receiver. The slot in the guide-tube is just wide enough to permit the follower-tooth to pass without cramping, in order not to impede the free sliding movement of the follower. The slot in the receiver is considerably wider than the slot in the guide-tube. 70

From the guide tube there projects laterally a pin, g, which enters an inclined slot, h, in the receiver. This pin-and-slot connection causes the guide-tube to have a partial movement of rotation when it is moved longitudinally by means of the pressure cap, and the efiect of this is to carry the follower-tooth to one side or the other of, the wide slot 1) in the receiver. When the pressure cap is pushed forward, as indicated in Fig. 2, the tooth-follower is carried out of engagement with the toothed edge of slot b, and the follower is released and free to move. When pressure on the cap is removed the reaction of the spring draws back the tube, and consequently forces the follower-tooth over into engagement with the toothed edge 0, thus locking the follower.

It is manifest that, in lieu of the arrangement represented, the inner guide-tube may be stationary, and the receiver may be attached to the pressure-cap with the same result.

What I claim, and desire to secure by Letters Patent, is

The combination of the sheath or handle, the slotted and toothed receiver, the toothed follower, the intermediate slotted guide-tube, connected with the receiver by a pin-and-slot connection, substantially as described, the pressure-cap, and the spring, these parts being connected and arranged together for joint operation, substantially as hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 16th day of December, 1-880.

Witnesses: JOSEPH HOFFMAN.

LEOPOLD AUSBAGHER, J on W. SwAME. 

